EP0851413A2 - Information recording apparatus - Google Patents
Information recording apparatus Download PDFInfo
- Publication number
- EP0851413A2 EP0851413A2 EP97122320A EP97122320A EP0851413A2 EP 0851413 A2 EP0851413 A2 EP 0851413A2 EP 97122320 A EP97122320 A EP 97122320A EP 97122320 A EP97122320 A EP 97122320A EP 0851413 A2 EP0851413 A2 EP 0851413A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- recording
- mark
- period
- level
- medium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/0045—Recording
- G11B7/00452—Recording involving bubble or bump forming
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/0045—Recording
- G11B7/00456—Recording strategies, e.g. pulse sequences
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10502—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing characterised by the transducing operation to be executed
- G11B11/1053—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing characterised by the transducing operation to be executed to compensate for the magnetic domain drift or time shift
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10595—Control of operating function
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/0045—Recording
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/0045—Recording
- G11B7/00454—Recording involving phase-change effects
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
- G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
- G11B7/127—Lasers; Multiple laser arrays
- G11B7/1275—Two or more lasers having different wavelengths
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/0055—Erasing
- G11B7/00557—Erasing involving phase-change media
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/006—Overwriting
Definitions
- the present invention relates to an information recording apparatus, particularly an optical disk drive, which records data by applying energy to a recording medium to form thereon local physical changes of the medium.
- Optical disks currently prevailed are roughly divided into magneto-optical disks and phase change disks.
- magneto-optical disks a mark of an inverted magnetic domain is formed on a recording film by heating the film, and in the case of phase change disks, a mark of an amorphous region is formed on a recording film by changing a cooling speed of the film under the control of an energy amount when it is heated.
- phase change disks a mark of an amorphous region is formed on a recording film by changing a cooling speed of the film under the control of an energy amount when it is heated.
- the size of a data carrying mark is reduced, or each change unit of the mark length and space length is made short to narrow a time interval between mark edge detections. In each of these methods, it is essential to form a mark at a high precision.
- the problems associated with a recording waveform to be solved are the following two problems.
- the first problem is related to suppression of thermal crosstalk to uniformly form nearby marks independently from the interval therebetween.
- the second problem is related to a constant heat accumulation to uniformly form consecutive marks independently from their lengths. If the thermal crosstalk suppression and constant heat accumulation can be realized, edge shifts of a reproduction signal can be suppressed so that a mark edge recording method suitable for high linear recording density can be adopted. If constant heat accumulation can be realized, reproduced crosstalk can be made constant so that the track interval can be shortened and the recording area density can be improved.
- the recording waveform corresponding to a mark forming period is constituted of a series of pulse trains corresponding to the lengths of marks in a channel data sequence.
- the number of pulses and the width of pulses are controlled in accordance with the lengths of marks in the channel data sequence.
- the recording waveform corresponding to the mark forming period is divided into two portions, a front portion and a succeeding portion, and generally the height of each pulse is different.
- a space portion is provided before an auxiliary recording pulse which is generated during this period.
- the mark forming period reflects the length of a mark in the channel data sequence, and is defined as shown in Fig.
- the mark non-forming period reflects the length of a space in the channel data sequence, and is defined as a period other than the mark forming period. The above definitions are applied also to the following description of this specification.
- the first conventional technique with the above-described structure holds the position that thermal diffusion directly from the preceding mark formed portion to the immediately succeeding mark leading edge can be compensated independently from the space length, and that the mark width and mark edge position can be controlled at high precision.
- a portion of the recording waveform corresponding to the immediately succeeding mark forming period is made variable.
- a recording energy irradiating means is provided which with reference to the lengths of preceding spaces 401 and 403, the recording waveforms corresponding to marks 402 and 404 are controlled, or more precisely, the leading edge forming positions of the marks 402 and 404 are controlled.
- This second conventional technique holds the position that thermal diffusion directly from the preceding mark formed portion to the immediately succeeding mark leading edge can be compensated independently from the space length, and that the mark width and mark edge position can be controlled at high precision.
- JP-A-5-143993 Another conventional technique disclosed in JP-A-5-143993 describes that if the blanking period between an immediately preceding light pulse and a current light pulse is short, heat generated by the immediately preceding light pulse influences the current light pulse and therefore this preheat effects are made to have the same effects as the long blanking period, and that the energy level and width of a light pulse supplied from a bias light irradiating unit provided immediately before the current light pulse are determined in accordance with the measured pulse width of the preceding light pulse and the measured blanking period.
- each of the conventional techniques changes the conditions of forming a leading edge of a succeeding mark, this condition change is not satisfactory. Furthermore, each of the conventional techniques does not take into consideration the compensation for the thermal diffusion near to the leading edge forming position of an immediately succeeding mark in accordance with the level of the energy amount used for the formation of the preceding mark. Therefore, only if the preceding mark forming periods are constant, the succeeding mark can be reliably formed irrespective of the length of the mark non-forming period between two marks. However, if the immediately preceding mark forming period changes, it is difficult to form the leading edge of a succeeding mark at a target position even if the mark non-forming period between two marks is constant.
- the longer the preceding mark forming period the more the heat energy used for the formation of the preceding mark diffuses near to the leading edge forming position of the immediately succeeding mark, and the nearer the leading edge comes to the trailing edge of the immediately preceding mark.
- the above phenomena become more conspicuous as the linear recording density is raised or the mark non-forming period between two marks becomes short.
- each of the conventional techniques is unsatisfactory with respect to the constant heat accumulation, and cannot suppress sufficiently a shift of the trailing edge from a target position depending upon the mark width, if the mark width is shortened and the linear recording density is raised. Namely, the trailing edge position and mark width fluctuate depending upon the distance from the mark leading edge. The above phenomena become conspicuous as the linear recording density is raised.
- the invention provides an information recording apparatus for recording data by applying energy to a recording medium to form thereon local physical changes of the medium, the information recording apparatus comprising: recording energy irradiating means for generating at least two recording waveforms when marks or spaces of the same length in a channel data sequence are recorded.
- the invention further provides an information recording apparatus for recording data by applying energy to a recording medium to form thereon local physical changes of the medium, the information recording apparatus comprising: recording pattern analyzing means for analyzing a recording pattern in a channel data sequence when data is recorded; and recording energy irradiating means for generating at least two recording waveforms when marks or spaces of the same length in the channel data sequence are recorded, in accordance with the analyzed results by said recording pattern analyzing means.
- the recording pattern includes information on the lengths of marks and spaces, the sequential orders of marks and patterns and other information.
- the recording waveform indicates how a recording energy is applied to a recording medium, i.e., a time sequential change in a recording energy level.
- the conditions of forming the leading edge of a succeeding mark are precisely compensated with respect to the space length immediately after the preceding mark. Furthermore, thermal diffusion near to the leading edge forming position of an immediately succeeding mark is compensated depending upon the energy amount used for forming the immediately preceding mark. In the above manner, a mark can be formed reliably independently from the length of the immediately preceding mark and the length of a space between two marks.
- the invention provides an information recording apparatus for recording data by applying energy to a recording medium to form thereon local physical changes of the medium, the information recording apparatus comprising: recording energy irradiating means for generating a recording waveform during a mark forming period, the upper and lower envelopes of the recording waveform lowering as a time lapses from the start of the mark forming period.
- heat accumulation when a long mark is formed can be compensated precisely, and the trailing edge of a long mark can be formed precisely at a target position independently from the mark length.
- Fig. 1 is a diagram illustrating the structure of a disk drive of this invention.
- Fig. 2 is a diagram illustrating recording waveforms of the invention.
- Fig. 3 is a diagram showing the structure of a recording block of the disk drive of the invention.
- Fig. 4 is a diagram illustrating the operation of a recording pattern analyzer of the invention.
- Fig. 5 is a diagram illustrating the operation of the recording pattern analyzer of the invention.
- Fig. 6 is a diagram illustrating the operation of the recording pattern analyzer of the invention.
- Fig. 7 is a diagram illustrating the effects of high precision mark formation of the invention.
- Fig. 8 is a diagram illustrating different configurations of recording waveforms.
- Fig. 9 is a diagram showing the structure of a recording pattern analyzer of an information recording apparatus of this invention.
- Fig. 10 is a diagram illustrating the operation principle and effects of the information recording apparatus of the invention.
- a magneto-optical recording medium will be described as an example of a recording medium.
- the recording medium is not limited only thereto, but the techniques disclosed in the embodiments are shared by other recording media so long as they are of the type that data is recorded by applying energy to the recording medium to form local physical changes thereon.
- a recording waveform which changes only a single parameter will be described, the configuration of a recording waveform of this invention is not limited thereto.
- a different configuration of a recording waveform with its parameters being all different may also be used.
- a changing portion of a recording waveform may be a mark forming area, a mark non-forming area, or both areas.
- Parameters identifying a recording waveform are illustrative and are not limited thereto, but other configurations of a recording waveform identified with parameters different from the embodiments may also be used. Configurations of waveforms unable to be identified by common parameters such as shown in Fig. 8 at (a) and (b) may also be used.
- the level of recording energy means an average energy level during a period longer than a thermal relaxation time of a recording film of a recording medium. If the frequency components sufficiently higher than that corresponding to a period of a channel bit length (a change unit of edge positions of mark and space) are superposed upon a recording waveform from any reasons, the recording energy level means an average energy level during a period longer than that which can neglect the influence of the frequency components.
- Fig. 1 is a diagram showing an example of the structure of an information recording apparatus of this invention.
- User data 115 to be recorded is temporarily stored in a buffer 114 by a predetermined amount under the control of a controller 118.
- Recording data 127 supplied from the buffer 114 is converted into a channel data sequence 126 by an encoder 113, the channel data sequence corresponding to the positions of marks (not shown) to be formed on a magneto-optical medium 117.
- the channel data sequence 126 is supplied to a recording waveform generator 112 whereat it is converted into level control signals 125 corresponding to the recording waveform.
- the encoder 113 and recording waveform generator 112 operate synchronously with a reference timing signal 128 generated by a reference timing generator 119.
- a laser driver 111 generates a laser drive current 124 in accordance with the level control signals 125 to make a laser 110, as a recording energy source, emit light in accordance with the recording waveform.
- a laser light 123 radiated from the laser 110 passes through a half mirror 108 and an objective lens 116 and is converged onto the magneto-optical recording medium 117 to heat its recording film (not shown) and form a mark.
- a mark sequence on the magneto-optical recording medium 117 is scanned with a laser beam 123 having a low level to the extent that is does not destruct a mark.
- Light reflected from the magneto-optical recording medium 117 passes through the objective lens 116 and half mirror 108 and is incident upon a polarization beam splitter 107 which splits the reflected light, whose polarizing surface rotates in a reverse direction in accordance with the mark magnetization direction, into orthogonal polarization light beams each being directed via a detection lens 106 to a photo detector 101.
- the photo detectors 101 convert the orthogonal polarization light beams into electrical signals proportional to the intensities of the light beams.
- Each electrical signal is amplified by a preamplifier 102 of each photo detector 101 to a sufficient amplitude, and thereafter supplied to a differential amplifier 102.
- the differential amplifier 102 amplifies a difference between input signals and generates a magneto-optical signal 120 corresponding to a presence/absence of a mark at the scanned position of the magneto-optical recording medium 117.
- the magneto-optical signal 120 undergoes a wave equalizing process at an equalizer and is converted into a binary signal by a comparator 104.
- a decoder 105 performs an inverse modulation of the encoder 113 to convert the binary signal 121 into reproduced data which is stored in the buffer 114 by a predetermined amount under the control of the controller 118 and output from the apparatus as user data 115.
- Fig. 2 at (a) to (d) is a diagram showing marks and spaces of a channel data sequence and corresponding recording waveforms of this invention.
- Fig. 2 at (a) shows a channel data sequence generated from recording data by the encoder.
- Fig. 2 at (b) shows an image of a mark sequence on a recording medium.
- a recording/reproducing laser light spot is scanned from the left to right in Fig. 2 at (b).
- Each mark 202 is one-to-one correspondence with each mark of the channel data sequence 200, and has a length corresponding to the duration of each mark of the channel data sequence 200.
- Fig. 2 at (c) shows an example of a recording waveform of the invention corresponding to the channel data sequence 200 shown in Fig. 2 at (a).
- This recording waveform has two different configurations for the record of two marks having the same length of 2L.
- Fig. 2 at (d) shows another example of a recording waveform of the invention corresponding to the channel data sequence 200 shown in Fig. 2 at (a).
- This recording waveform has two different configurations for the record of spaces having the same length of 3L.
- a length L is a minimum unit of a change amount of a mark/space length of the channel data sequence 200.
- Fig. 3 is a detailed diagram showing an example of the structure of a recording block 129 shown in Fig. 1.
- the encoder 113 converts the recording data 127 into the channel data sequence 126 in accordance with a predetermined modulation rule.
- the channel data sequence 126 is input to a recording pattern analyzer 302, a mark length latch 300 and a space length latch 301.
- the mark length latch 300 holds a length of each mark in the channel data sequence 126 for a predetermined period in a FIFO manner
- the space length latch 301 holds a length of each space in the channel data sequence 126 for a predetermined period in a FIFO manner.
- the mark length and space length held by the latches are input to a recording pattern analyzer 302.
- the recording pattern analyzer 302 With reference to the channel data sequence 126 supplied from the encoder 113 and the data in the mark length latch 300 and space length latch 301 which data is information of a preceding recording pattern, the recording pattern analyzer 302 generates a Pb control signal 311, a Pa control signal 312, a Pw1 control signal 313 and a Pw2 control signal 314 corresponding to an actual recording waveform, in a manner adaptative to the preceding recording pattern. With reference to these level control signals 125, the laser driver 111 synthesizes the laser drive current 124 and drives the laser 110 as the recording energy source. The encoder 113, recording pattern analyzer 302, mark length latch 300 and space length latch 301 operate synchronously with the reference timing signal 128 to transfer and generate various signals.
- the channel data sequence output from the encoder is now classified into each pair of mark and space, to represent the length of an n-th (n is a natural number) mark by M(n) and the length of an n-th space by S(n).
- the mark length latch 300 holds the immediately preceding mark length M(n) until the immediately succeeding (n+1)-th mark is completely recorded
- the space length latch 301 holds the immediately preceding space length S(n) until the immediately succeeding (n+1)-th space is completely recorded.
- the mark length latch 300 holds the n-th mark length M(n) and supplies it to the recording pattern analyzer 302 until the information recording apparatus completely records the (n+1)-th mark.
- the recording pattern analyzer 302 controls the level control signal 125. For example, in the case of the recording waveform shown in Fig.
- the recording pattern analyzer 302 controls the level control signal 125 so that the energy level of the start pulse for the record of the (n+1)-th mark (during the mark forming period) becomes Pw3, whereas if M(n) is shorter than 3L, the recording pattern analyzer 302 controls the level control signal 125 so that the energy level of the start pulse for the record of the (n+1)-th mark becomes Pw4.
- the values of Pw3 and Pw4 are assumed to be different.
- the mark length latch 300 holds the n-th mark length M(n) and supplies it to the recording pattern analyzer 302 until the information recording apparatus completely records the n-th space.
- the recording pattern analyzer 302 controls the level control signal 125. For example, in the case of the recording waveform shown in Fig.
- the recording pattern analyzer 302 controls the level control signal 125 so that the energy level of a low level period provided at the start for the record of the n-th space (during the mark non-forming period) becomes Tb1, whereas if M(n) is shorter than 3L, the recording pattern analyzer 302 controls the level control signal 125 so that the energy level of a low level period provided at the start for the record of the n-th space becomes Tb2.
- the values of Tb1 and Tb2 are assumed to be different.
- the recording pattern analyzer 302 refers only to the immediately preceding mark length or space length as the information of the preceding recording pattern. However, this arrangement does not limit the structure and operation of the mark length latch and space length latch, but two or more mark lengths and space lengths may be used.
- Fig. 9 is the detailed diagram showing an example of the structure of the recording pattern analyzer 302 shown in Fig. 3.
- recording data is (1,7) RLL modulated and thereafter mark edge recorded and that the recording waveform shown in Fig. 2 at (d) is generated.
- the recording data 127 is (1,7) RLL modulated and thereafter NRZI modulated to be converted into a channel data sequence 126.
- the channel data sequence 126 is input to a mark length latch 300 and a counter 1000.
- the mark length latch 300 holds the length of each mark in the channel data sequence 126 until the start of the next mark forming period, and supplies it to a comparator 1002.
- the comparator 1002 compares the mark length with 2L which is the shortest mark length used by the encoder 113, and judges whether the mark length is 2L or whether it is 3L or longer. This judgement result is transferred to a waveform encoder 1001. With reference to a reference timing signal 128 which is a clock signal having a period L, the counter 1000 measures a lapse time from the start edge of a mark or space in the channel data sequence 126 in the unit of L, and supplies the time count result to the waveform encoder 1001.
- the waveform encoder 1001 exclusively generates a Pb control signal 311, a Pa control signal 312, a Pw1 control signal 313 and a Pw2 control signal 314 corresponding to the recording waveform shown in Fig. 2 at (d).
- These level control signals 125 are generated adaptatively to the preceding recording pattern.
- the period while the Pb control signal 311 is generated at the start of the mark non-forming period is Tb2 if the length of the immediately preceding mark in the channel data sequence 126 is determined from the comparison result by the comparator to be shortest 2L, whereas it is Tb1 if the length is determined to be 3L or longer.
- Tb1 and Tb2 are not dependent on the length of each space in the channel data sequence 126, but have a relationship Tb1 > Tb2. In this example, therefore, a space length latch is not specifically required.
- the level control signals 125 having a predetermined pattern are sequentially output from the waveform encoder 1001.
- the laser driver 111 synthesizes a laser drive current 124 and drives the laser 110 as the recording energy source.
- the whole circuit operates synchronously with the reference timing signal 128 to transfer and generate various signals.
- Fig. 10 is a diagram illustrating the effects of the recording pattern analyzer of this invention shown in Fig. 9.
- This graph shows an example of measurement results of mark edge positions of a signal reproduced from a mark edge recorded magneto-optical recording medium.
- a solid symbolled curve corresponds to a conventional apparatus, and an open symbolled curve corresponds to the apparatus of this invention.
- a change in the shape of a succeeding mark relative to a preceding mark length was measured by fixing the interval between two marks.
- the mark interval and the succeeding mark length were set to 2L which was the shortest length of the modulation rule used by the encoder 113, and the preceding mark length was changed in the range from 2L to 8L.
- a light spot diameter was about 1.2 ⁇ m and a detection window width L was 0.27 ⁇ m.
- ⁇ E is a shift of a succeeding mark leading edge from an ideal position, the sign of a shift amount being set positive in the delay direction.
- the shift amount was plotted as a percentage of ⁇ E in the detection window width L.
- the preceding mark becomes long, the leading edge gradually shifts.
- the leading edge shifts greatly if the preceding mark is 3L or longer, as compared to the preceding mark of 2L. In other words, if the preceding mark is 3L or longer, the succeeding mark is formed considerably large as compared to the preceding mark of 2L.
- ideal marks can be formed, the edge shifts become constant independent from the preceding mark lengths. If the edge shifts are constant, this shift can be removed through signal processing.
- a constant heat compensation period (Pb level period shown in Fig. 2 at (d)) for stopping heating immediately after the mark forming period is always provided to compensate for thermal interference corresponding to the preceding space length, i.e., position related thermal interference.
- this constant heat compensation period has been expected to make the edge shifts generally constant independently from either a preceding mark length or a preceding space length. The reason for this is as follows.
- a conventional apparatus has a limit in high linear density recording. It can be understood from detailed studies of the solid symbolled curve shown in Fig. 10 that there is a large difference of the edge shift between the shortest preceding mark length 2L and the mark length 3L or longer. This means that heat conduction to the succeeding mark becomes different depending upon whether the preceding mark has a portion longer than 2L from the trailing edge thereof toward the upstream direction (opposite to the light spot scanning direction), i.e., whether the preceding mark length is shortest 2L. Namely, the space of the succeeding mark becomes different depending upon whether there is heat conduction from the portion longer than 2L from the trailing edge of the preceding mark toward the upstream direction to the succeeding mark.
- the recording waveform shown in Fig. 2 at (d) is generated by the recording pattern analyser shown in Fig. 9 by changing the conditions of forming a succeeding mark adaptatively to the preceding mark length.
- the recording waveform shown in Fig. 2 at (d) is generated by the recording pattern analyzer shown in Fig. 9 by changing the heat compensation period.
- the heat shielding period is prolonged to reduce a preheat amount. Therefore, as seen from the white plotted curve of Fig. 10, the edge positions of succeeding marks are stable independently from the preceding mark lengths, and nearly ideal marks can be formed.
- the duration of the heat shielding period is changed as a method of changing the conditions of forming a succeeding mark, other methods may be used such as changing the recording waveform of a succeeding mark itself as shown in Fig. 2 at (c).
- Fig. 4 at (a) to (j) and Figs. 5 and 6 show mark sequences and their waveforms illustrating the operation of the recording pattern analyzer 302 shown in Fig. 2.
- Fig. 5 at (a) and Fig. 6 at (a) show images of mark sequences to be formed on a recording medium and corresponding to channel data sequences.
- L is the minimum unit (channel bit length) of a change amount of a length of each of marks 401, 501 and 601 and spaces 402, 502 and 602.
- a recording/reproducing laser light spot scans from the left to right in Figs. 4 to 6 at (a).
- a target edge interval of the marks 401, 501 and 601 and spaces 402, 502 and 602 is always an integer multiple of L.
- Fig. 4 at (b) shows a reference timing signal which is a clock signal of a period T for controlling the recording block. Signals including the recording waveform of the recording block are generated and transferred synchronously with this clock signal.
- the clock signal is a rectangular wave with a duty ratio of 50 %, the high and low level periods each being equal to Tw.
- T 2Tw
- the energy level holding period to be described below is an integer multiple of Tw, i.e., an integer multiple or a half-odd integer multiple of the period T of the reference timing signal.
- Fig. 4 at (c) is a diagram showing an example of a recording waveform used by a conventional information recording apparatus.
- the recording waveform is mainly classified into a mark forming period and a mark non-forming period.
- the mark forming period high level energy necessary for the formation of a mark is intermittently irradiated
- the mark non-forming period is the period other than the mark forming period and corresponds to a space.
- any one or ones of energy levels Pa, Pb, Pw1 and Pw2 are generated, and in the mark non-forming period, energy levels Pb and Pa are consecutively generated.
- the mark forming period corresponding to the mark of 2L is constituted of a single pulse having a width Tw and a level Pw1.
- a pulse having a width Tw and a level Pw2 is added at a repetition period of T.
- the level between the levels Pw1 and Pw2 is always Pb.
- Fig. 4 at (d) is a diagram showing an example of a recording waveform used by an information recording apparatus of this invention.
- energy levels are sequentially output in the order of first Pw1, Pa1, Pw3, Pa2, Pw2 and Pb, and then repetitions of Pw2 and Pb.
- the upper and lower envelopes of the recording waveform lower as the time lapses after the start of the mark forming period.
- the holding time of each level is equal to Tw.
- Fig. 4 at (e) is a diagram showing another example of a recording waveform used by the information recording apparatus of this invention.
- the mark forming period the upper and lower envelopes of the recording waveform lower as the time lapses after the start of the mark forming period.
- the holding time of each level is equal to Tw.
- the recording waveform is adaptatively changed with a preceding recording pattern, i.e., immediately preceding mark length. More specifically, the mark forming period corresponding to the mark of 2L is constituted of a single pulse having a width Tw and a level Pw1.
- a pulse having a width Tw and a level Pw2 is added at a repetition period of T.
- the level between the levels Pw1 and Pw2 is Pa
- the level between level Pw2 pulses is Pb.
- a level Pb period is provided as the start period, and the Pa level is maintained to the succeeding mark forming period.
- the energy levels forming the upper envelope during the mark forming period are two levels and the energy levels forming the lower envelope are two levels.
- the number of energy levels is not intended to be limitative.
- three levels or more may be used for forming the upper and lower envelopes. This may also be applied to other examples shown in Fig. 4 at (f) to (j) to follow.
- Fig. 4 at (f) is a diagram showing another example of a recording waveform used by the information recording apparatus of this invention.
- the mark forming period the upper and lower envelopes of the recording waveform lower as the time lapses after the start of the mark forming period.
- the holding time of each level is equal to Tw.
- this recording waveform is adaptatively changed with a preceding recording pattern, i.e., immediately preceding mark length. More specifically, the mark forming period corresponding to the mark of 2L is constituted of a single pulse having a width Tw and a level Pw1.
- a pulse having a width Tw and a level Pw2 is added at a repetition period of T.
- the level between the levels Pw1 and Pw2 is Pa
- the level between level Pw2 pulses is Pb.
- Tb 3Tw
- the levels Pa1 and Pa2 are adaptatively set to Pa1 if the preceding mark length is 2L, and to Pa2 if it is 3L or longer.
- Fig. 4 at (g) is a diagram showing another example of a recording waveform used by the information recording apparatus of this invention.
- the mark forming period the upper and lower envelopes of the recording waveform lower as the time lapses after the start of the mark forming period.
- the holding time of each level is equal to Tw.
- this recording waveform is adaptatively changed with a preceding recording pattern, i.e., immediately preceding mark length. More specifically, the mark forming period corresponding to the mark of 2L is constituted of a single pulse having a width Tw and a level Pw1.
- a pulse having a width Tw and a level Pw2 is added at a repetition period of T.
- the level between the levels Pw1 and Pw2 is Pa
- the level between level Pw2 pulses is Pb.
- the level Pa is maintained to the succeeding mark forming period.
- the periods Th1 and Th2 are adaptatively set to Th1 if the preceding mark length is 2L, and to Th2 if it is 3L or longer.
- Fig. 4 at (h) is a diagram showing another example of a recording waveform used by the information recording apparatus of this invention.
- the mark forming period the upper and lower envelopes of the recording waveform lower as the time lapses after the start of the mark forming period.
- the start recording waveform is adaptatively changed with a preceding recording pattern, i.e., immediately preceding mark length.
- a pulse having a width Tw and a level Pw2 is added at a repetition period of T.
- the period of the level Pw1 adaptatively changes to Tw1 if the preceding mark length is 2L, and to Tw2 if it is 3L or longer.
- the level between the levels Pw1 and Pw2 is Pa, and the level between level Pw2 pulses is Pb.
- Fig. 4 at (i) is a diagram showing another example of a recording waveform used by the information recording apparatus of this invention.
- the mark forming period the upper and lower envelopes of the recording waveform lower as the time lapses after the start of the mark forming period.
- the holding time of each level is equal to Tw.
- the start recording waveform is adaptatively changed with a preceding recording pattern, i.e., immediately preceding mark length.
- the mark forming period corresponding to the mark of 2L is constituted of a single pulse having a width Tw and a level Pw1 or Pw3.
- a pulse having a width Tw and a level Pw2 is added at a repetition period of T.
- the levels Pw1 and Pw3 are adaptatively set to Pw1 if the preceding mark length is 2L, and to Pw3 if it is 3L or longer.
- the level between the levels Pw1 and Pw2 is Pa, and the level between level Pw2 pulses is Pb.
- Fig. 4 at (j) is a diagram showing another example of a recording waveform used by the information recording apparatus of this invention.
- the mark forming period the upper and lower envelopes of the recording waveform lower as the time lapses after the start of the mark forming period.
- the start recording waveform is adaptatively changed with a preceding recording pattern, i.e., immediately preceding mark length.
- the mark forming period corresponding to the mark of 2L is constituted of a single pulse having a width Tw and a level Pw1 or Pw3.
- Tm1 2Tw
- Tm2 Tw
- Tm1 and Tm2 are adaptatively set to Tm1 if the preceding mark length is 2L, and to Tm2 if it is 3L or longer.
- the level between the levels Pw1 and Pw2 is Pa
- the level between level Pw2 pulses is Pb.
- Fig. 5 at (c) is a diagram showing another example of a recording waveform used by the information recording apparatus of this invention.
- the lower envelope of the recording waveform lowers as the time lapses after the start of the mark forming period.
- the recording waveform is adaptatively changed with its own space length. More specifically, the mark non-forming period corresponding to the space of 2L is constituted of a level Pa period with a width of 4Tw and level Pb periods with a width Tw provided before and after the level Pa period.
- the mark forming period corresponding to the mark of 2L is constituted of a single pulse having a width Tw and a level Pw1.
- the mark forming period corresponding to the mark of 3L is constituted of a level Pw1 period with the width Tw followed by a level Pa period with the width Tw and a level Pw1 period with the width Tw. Thereafter, as the mark length is elongated at an increment of L, a level Pw2 pulse with the width Tw is added with a level Pb period with the width Tw being provided before the level Pw2 pulse.
- Fig. 6 at (c) is a diagram showing another example of a recording waveform used by the information recording apparatus of this invention.
- the mark forming period the lower envelope of the recording waveform lowers as the time lapses after the start of the mark forming period.
- the mark forming period corresponding to the mark of 2L is constituted of a single pulse having a width Tw and a level Pw1.
- the mark forming period corresponding to the mark of 3L is constituted of a level Pw1 period with the width Tw followed by a level Pa period with the width Tw and a level Pw1 period with the width Tw. Thereafter, as the mark length is elongated at an increment of L, a level Pw2 pulse with the width Tw is added with a level Pb period with the width Tw being provided before the level Pw2 pulse.
- Fig. 7 is a graph showing a relationship between a relative recording power and a jitter, the relationship being obtained through mark edge recording using recording waveforms of the invention apparatus and a conventional apparatus.
- the measurement conditions were as follows.
- An open symbolled broken line indicates a jitter (ratio to detection window width) obtained by measuring the interval of leading edges by using conventional recording waveforms, whereas a solid symbolled broken line indicates a jitter (ratio to detection window width) obtained by measuring the interval of trailing edges by using conventional recording waveforms.
- an open symbolled solid line indicates a jitter (ratio to detection window width) obtained by measuring the interval of leading edges by using recording waveforms of the invention
- a solid symbolled solid line indicates a jitter (ratio to detection window width) obtained by measuring the interval of trailing edges by using recording waveforms of the invention.
- the leading edge of the mark is formed generally at an ideal position so that the jitter can be improved as a whole.
- a power which optimizes the leading edge is the same as a power which optimizes the trailing edge.
- the levels of jitters of the leading and trailing edges are generally equal and the recording power margin is considerably improved.
- marks can be formed at a high precision by an information recording apparatus of the type which records data by applying energy to a recording medium to form thereon local physical changes of the medium. It is therefore possible to adopt a mark edge recording method which is suitable for high linear recording density. Furthermore, by realizing a constant heat accumulation, a reproduction crosstalk can be made constant and the track interval can be shortened. Accordingly, the recording area density can be improved. Since the recording/reproducing operation can be stabilized greatly and at the same time the information recording apparatus and recording media can be made compact, the manufacture cost can be reduced.
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Abstract
Description
Claims (13)
- An information recording apparatus for recording data by applying energy to a recording medium to form thereon local physical changes of the medium, comprising:recording energy irradiating means (129) for generating at least two recording waveforms when spaces or marks of the same length in a channel data sequence are recorded.
- An information recording apparatus for recording data by applying energy to a recording medium to form thereon local physical changes of the medium, comprising:means (300, 301, 302) for analysing a recording pattern in a channel data sequence when data is recorded; andrecording energy irradiating means (129) for generating at least two recording waveforms when spaces or marks of the same length in the channel data sequence are recorded, in accordance with the results analysed by said analysing means.
- An information recording apparatus for recording data by applying energy to a recording medium to form thereon local physical changes of the medium, comprising:means (300, 302) for discriminating the length of a mark or space in a channel data sequence when data is recorded; andrecording energy irradiating means (129) for generating at least two recording waveforms when succeeding marks or spaces of the same length in the channel data sequence are recorded, in accordance with the results discriminated by said discriminating means.
- An information recording apparatus for recording data by applying energy to a recording medium to form thereon local physical changes of the medium, comprising:means (300, 301, 302) for discriminating the length of a mark or space in a channel data sequence when data is recorded; andrecording energy irradiating means (129) for switching between at least two levels of a total energy irradiating amount during a mark forming or non-forming period when marks or spaces of the same length in the channel data sequence are recorded, in accordance with the results of preceding mark or space lengths discriminated by said discriminating means.
- An information recording apparatus for recording data by applying energy to a recording medium to form thereon local physical changes of the medium, comprising:means (302) for discriminating the total energy irradiating amount of each mark or space when data is recorded; andrecording energy irradiating means (129) for switching between at least two levels of the total energy irradiating amount during a mark forming or mark non-forming period, in accordance with the results discriminated by said total energy irradiating amount discriminating means.
- An information recording apparatus for recording data by applying energy to a recording medium to form thereon local physical changes of the medium, comprising:mark length holding means (300) for holding a mark length of a mark in a channel data sequence when data is recorded;discriminating means (1002) for discriminating the held result by said mark length holding means; andrecording energy irradiating means (129) for generating, in accordance with the results of the mark discriminated by said discriminating means, at least two recording waveforms when a space or another mark is recorded immediately after the first mark.
- An information recording apparatus for recording data by applying energy to a recording medium to form thereon local physical changes of the medium, comprising:recording energy irradiating means (129) for generating a recording waveform during a mark forming period, the upper and lower envelopes of the recording waveform lowering with the lapse of time from the start of the mark forming period.
- The apparatus of any one of claims 1 to 15, wherein the upper or lower envelope of the recording waveform during a mark forming period lowers as a time lapses from the start of the mark forming period.
- The apparatus of any one of claims 1 to 6, wherein the recording waveform includes a mark forming period with at least two energy levels and a mark non-forming period with at least two energy levels.
- The apparatus of any one of claims 1 to 6, further comprising reference timing generating means (119) for generating a reference time to control the recording waveform, wherein a holding time of each recording energy level is approximately an integer multiple of the reference time or approximately a half-odd integer multiple of the reference time.
- An information recording method for recording data by applying energy to a recording medium to form thereon local physical changes of the medium and form thereon a series of recording marks, wherein:in forming a predetermined recording mark among a series of recording marks, a pattern of a preceding recording mark is discriminated, and in accordance with the discriminated result, at least two recording waveforms are generated relative to the recording mark to be formed or a space between the recording mark and an immediately preceding recording mark.
- An information recording apparatus for recording data by applying energy to a recording medium to form thereon local physical changes of the medium, comprising:a comparator for judging whether a mark length of a mark immediately preceding a space in a recording waveform for applying energy is shortest or not; anda waveform encoder for changing the duration of a first period at a first level provided at the start of the space in accordance with an output from said comparator, the first period being followed by a second period at a second level higher than the first level.
- An information recording method for recording data by applying energy to a recording medium to form thereon local physical changes of the medium, comprising the steps of:judging whether a mark length of a mark immediately preceding a space in a recording waveform for applying energy is shortest or not; andif shortest, setting a duration of a first period at a first level provided at the start of the space to Tb1, whereas if not shortest, setting the first period longer than Tb1, the first period being followed by a second period at a second level higher than the first level.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP347143/96 | 1996-12-26 | ||
JP34714396 | 1996-12-26 | ||
JP34714396 | 1996-12-26 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0851413A2 true EP0851413A2 (en) | 1998-07-01 |
EP0851413A3 EP0851413A3 (en) | 1999-08-18 |
EP0851413B1 EP0851413B1 (en) | 2004-10-27 |
Family
ID=18388209
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97122320A Expired - Lifetime EP0851413B1 (en) | 1996-12-26 | 1997-12-17 | Information recording apparatus |
Country Status (7)
Country | Link |
---|---|
US (6) | US6104685A (en) |
EP (1) | EP0851413B1 (en) |
JP (2) | JP3608926B2 (en) |
KR (2) | KR100498623B1 (en) |
CN (4) | CN100535997C (en) |
DE (1) | DE69731364T2 (en) |
TW (1) | TW379323B (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0902424A1 (en) * | 1997-09-09 | 1999-03-17 | Hitachi, Ltd. | Information recording method and apparatus with suppressed mark edge jitters |
EP0933759A2 (en) * | 1998-01-30 | 1999-08-04 | Sony Corporation | Data recording and optical disc drive |
EP0977184A2 (en) * | 1998-07-23 | 2000-02-02 | Samsung Electronics Co., Ltd. | Adaptive writing method and circuit for a high-density optical recording apparatus |
WO2000028535A1 (en) * | 1998-11-06 | 2000-05-18 | Matsushita Electric Industrial Co., Ltd. | Method and device for finding conditions on recording pulse of optical disk |
WO2001086643A2 (en) * | 2000-05-11 | 2001-11-15 | Koninklijke Philips Electronics N.V. | Methods and devices for recording marks on a recording surface of an optical record carrier |
WO2003023769A1 (en) * | 2001-09-10 | 2003-03-20 | Pioneer Corporation | Information recording apparatus and information recording method |
US6975571B1 (en) | 1999-03-19 | 2005-12-13 | Matsushita Electric Industrial Co., Ltd. | Method for optically recording information and device for optically recording information by the same |
EP1361569A3 (en) * | 2002-05-09 | 2006-08-30 | Fuji Photo Film Co., Ltd. | Optical information recording method and optical information recording medium |
EP1117094A3 (en) * | 2000-01-17 | 2006-11-15 | Mitsubishi Kagaku Media Co., Ltd. | Recording method for phase-change recording medium |
US7158461B1 (en) | 1997-12-30 | 2007-01-02 | Samsung Electronics Co., Ltd. | Adaptive writing method for high-density optical recording apparatus and circuit thereof |
EP1884938A2 (en) * | 1997-12-08 | 2008-02-06 | Koninklijke Philips Electronics N.V. | Method for writing optical record carriers |
US7391698B2 (en) | 1998-07-23 | 2008-06-24 | Samsung Electronics Co., Ltd. | Adaptive writing method for high-density optical recording apparatus and circuit thereof |
US8045437B2 (en) | 2002-06-18 | 2011-10-25 | Koninklijke Philips Electronics N.V. | Method and device for recording marks representing data in an information layer of an optical record carrier |
Families Citing this family (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11273076A (en) * | 1998-03-23 | 1999-10-08 | Toshiba Corp | Optical information recording method and device therefor |
KR100322601B1 (en) * | 1999-06-18 | 2002-03-18 | 윤종용 | Recording method for optical disk recording, control method for optical disk recording apparatus, and recording apparatus of optical disk |
KR100809492B1 (en) * | 1999-07-15 | 2008-03-03 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | Methods and devices for recording marks in an information layer of an optical record carrier, and record carriers for use therein |
US7272094B2 (en) * | 1999-07-15 | 2007-09-18 | Koninklike Philips Electronics N.V. | Methods and devices for recording marks in an information layer of an optical record carrier, and record carriers for use therein |
JP2001067669A (en) * | 1999-08-31 | 2001-03-16 | Sony Corp | Recorder and recording method |
AU2002211769B2 (en) * | 2000-10-20 | 2006-10-26 | Promega Corporation | Radio frequency identification method and system of distributing products |
US20020183882A1 (en) | 2000-10-20 | 2002-12-05 | Michael Dearing | RF point of sale and delivery method and system using communication with remote computer and having features to read a large number of RF tags |
USRE47599E1 (en) | 2000-10-20 | 2019-09-10 | Promega Corporation | RF point of sale and delivery method and system using communication with remote computer and having features to read a large number of RF tags |
US6388970B1 (en) * | 2000-11-30 | 2002-05-14 | Oak Technology, Inc. | Compensation for thermal effects in CD write strategy |
US6510120B2 (en) * | 2001-01-31 | 2003-01-21 | International Business Machines Corporation | Method for writing and/or erasing high density data on a media |
JP4351813B2 (en) * | 2001-04-20 | 2009-10-28 | 株式会社東芝 | Optical disk device |
TWI242194B (en) * | 2001-09-26 | 2005-10-21 | Sony Corp | Parallel/serial conversion circuit, light output control circuit, and optical recording apparatus |
US7525890B2 (en) * | 2001-09-29 | 2009-04-28 | Samsung Electronics Co., Ltd. | Method of and apparatus for recording data on optical recording medium |
TWI237816B (en) * | 2001-09-29 | 2005-08-11 | Samsung Electronics Co Ltd | Method for recording data on optical recording medium |
JP2003123252A (en) | 2001-10-09 | 2003-04-25 | Hitachi Ltd | Method and device for recording information |
JP3740413B2 (en) * | 2001-12-20 | 2006-02-01 | 株式会社日立製作所 | High frequency superimposing method and optical disk apparatus using the same |
US7376064B2 (en) | 2002-02-25 | 2008-05-20 | Samsung Electronics Co., Ltd. | Method and apparatus for recording data on optical recording medium |
KR100911140B1 (en) | 2002-06-03 | 2009-08-06 | 삼성전자주식회사 | Method and apparatus for recording data on an optical recording medium |
JP2004079078A (en) * | 2002-08-19 | 2004-03-11 | Nec Corp | Optical recording medium and its information recording method, recorder |
EP1596374B1 (en) | 2003-02-19 | 2011-10-12 | Victor Company Of Japan, Limited | Optical recording method and optical recording apparatus |
CN100341055C (en) * | 2003-02-28 | 2007-10-03 | 日本先锋公司 | Information recording device and information recording method |
CA2467888A1 (en) | 2003-05-23 | 2004-11-23 | Matsushita Electric Industrial Co., Ltd. | Apparatus for recording information in information recording medium, information recording medium, method for recording information in information recording medium, program for recording information in information recording medium, and program product |
EP1482486A3 (en) | 2003-05-27 | 2007-06-27 | Matsushita Electric Industrial Co., Ltd. | Optical information recording method, optical information recording device and optical information recording medium |
JP3732499B2 (en) * | 2003-08-26 | 2006-01-05 | 株式会社リコー | Dye-type recordable DVD medium recording / reproducing method and apparatus |
JP4179994B2 (en) | 2004-02-05 | 2008-11-12 | Tdk株式会社 | Information recording method and information recording apparatus for optical recording medium |
JP4353023B2 (en) * | 2004-07-30 | 2009-10-28 | 株式会社日立製作所 | Test writing method, information recording method |
US8369199B2 (en) * | 2005-02-17 | 2013-02-05 | Mediatek Inc. | Methods and systems for tuning at least one write strategy parameter of an optical storage device |
US7006420B1 (en) | 2005-02-17 | 2006-02-28 | Mediatek Incorporation | Method for tuning write strategy parameters of an optical storage device, and system thereof |
JP4796796B2 (en) * | 2005-08-01 | 2011-10-19 | 株式会社日立製作所 | Information recording method and information recording apparatus |
US20080225777A1 (en) * | 2005-11-04 | 2008-09-18 | Koninklijke Philips Electronics, N.V. | Method and Device for Controlling Write Power in a Recordable Optical Storage System |
JP2007335044A (en) * | 2006-06-19 | 2007-12-27 | Hitachi Ltd | Information recording device |
US7710275B2 (en) * | 2007-03-16 | 2010-05-04 | Promega Corporation | RFID reader enclosure and man-o-war RFID reader system |
JP2010033679A (en) * | 2008-07-30 | 2010-02-12 | Sony Corp | Optical information recording device, optical pickup, and laser beam emission method |
JP5189064B2 (en) * | 2009-11-26 | 2013-04-24 | 日立コンシューマエレクトロニクス株式会社 | Optical disc recording method and optical disc recording apparatus |
US20110160645A1 (en) * | 2009-12-31 | 2011-06-30 | Boston Scientific Scimed, Inc. | Cryo Activated Drug Delivery and Cutting Balloons |
US9558607B2 (en) * | 2012-11-14 | 2017-01-31 | Infineon Technologies Ag | Relay attack prevention using RSSIPPLX |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3804240A1 (en) * | 1987-02-12 | 1988-08-25 | Hitachi Ltd | METHOD AND DEVICE FOR OPTICAL INFORMATION RECORDING |
US5412626A (en) * | 1992-03-23 | 1995-05-02 | Matsushita Electric Industrial Co., Ltd. | Method of recording optical information with selective correction in pulse waveform and a recording system therefor |
EP0713213A1 (en) * | 1994-11-18 | 1996-05-22 | International Business Machines Corporation | Pulse width modulation optical disk drive with pulsed laser preheating between marks |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5577015A (en) * | 1980-07-16 | 1996-11-19 | Discovision Associates | System for recording digital information in a pulse-length modulation |
JP2644501B2 (en) * | 1987-09-19 | 1997-08-25 | キヤノン株式会社 | Data recording / reproducing device |
JP2677325B2 (en) * | 1987-12-07 | 1997-11-17 | 株式会社日立製作所 | How information is recorded |
JPH05298737A (en) * | 1992-04-21 | 1993-11-12 | Hitachi Ltd | Recording and reproducing control method of information |
US5642343A (en) | 1990-06-29 | 1997-06-24 | Hitachi, Ltd. | Magnetooptic disc apparatus and recording medium |
JPH04265522A (en) * | 1991-02-21 | 1992-09-21 | Hitachi Ltd | Optical information recording and reproducing device |
JPH05143993A (en) * | 1991-11-18 | 1993-06-11 | Olympus Optical Co Ltd | Optical information recording method |
US5396490A (en) * | 1992-03-23 | 1995-03-07 | Motorola, Inc. | Packet reassembly method and apparatus |
JP3135389B2 (en) * | 1992-10-23 | 2001-02-13 | 松下電器産業株式会社 | Information reproducing method, information recording / reproducing method, information reproducing apparatus, recording medium, and optical head |
US5432762A (en) * | 1992-11-12 | 1995-07-11 | Teac Corporation | Detection apparatus for detecting sector marks of optical disk and optical disk access apparatus |
JP2679596B2 (en) * | 1993-11-09 | 1997-11-19 | 松下電器産業株式会社 | Disc recording method and disc recording apparatus |
US5490126A (en) * | 1993-04-07 | 1996-02-06 | Matsushita Electric Industrial Co., Ltd. | Apparatus for recording and reproducing data on a disk |
JP2883538B2 (en) * | 1994-07-20 | 1999-04-19 | 株式会社東芝 | Optical information reproducing device |
JPH08124160A (en) * | 1994-10-21 | 1996-05-17 | Sony Corp | Optical disk recording device |
US5530688A (en) * | 1994-10-31 | 1996-06-25 | International Business Machines Corporation | Optical disk recording device using two modulated laser beams for recording information data |
US5815477A (en) * | 1995-01-31 | 1998-09-29 | Canon Kabushiki Kaisha | Write test method for use in recording process for recording information by modulating the power of a laser light thereby forming a high-temperature state and a low-temperature state on a recording medium |
JP3138610B2 (en) * | 1995-04-13 | 2001-02-26 | 株式会社リコー | Recording method for phase change optical disk |
US5732062A (en) * | 1995-10-16 | 1998-03-24 | Ricoh Company, Ltd. | Information recording apparatus, method and computer program product |
JPH10105970A (en) * | 1996-09-27 | 1998-04-24 | Toshiba Corp | Method and device for optical information recording |
WO2000057407A1 (en) * | 1999-03-19 | 2000-09-28 | Hitachi, Ltd. | Optical information reproducing device |
-
1997
- 1997-11-25 JP JP32265497A patent/JP3608926B2/en not_active Expired - Lifetime
- 1997-12-17 DE DE69731364T patent/DE69731364T2/en not_active Expired - Lifetime
- 1997-12-17 EP EP97122320A patent/EP0851413B1/en not_active Expired - Lifetime
- 1997-12-17 KR KR1019970069751A patent/KR100498623B1/en not_active IP Right Cessation
- 1997-12-18 TW TW086119190A patent/TW379323B/en not_active IP Right Cessation
- 1997-12-22 US US08/996,096 patent/US6104685A/en not_active Expired - Lifetime
- 1997-12-26 CN CNB2005100599837A patent/CN100535997C/en not_active Expired - Lifetime
- 1997-12-26 CN CN97123458A patent/CN1111846C/en not_active Expired - Lifetime
- 1997-12-26 CN CNB031236987A patent/CN1320528C/en not_active Expired - Fee Related
-
2000
- 2000-05-18 US US09/572,379 patent/US6188658B1/en not_active Expired - Lifetime
- 2000-11-16 US US09/712,985 patent/US6404716B1/en not_active Expired - Lifetime
- 2000-11-16 US US09/712,976 patent/US6430132B1/en not_active Expired - Lifetime
-
2001
- 2001-12-18 US US10/020,210 patent/US6512726B2/en not_active Expired - Lifetime
- 2001-12-18 US US10/020,211 patent/US6529466B2/en not_active Expired - Lifetime
-
2002
- 2002-11-21 KR KR1020020072646A patent/KR100522314B1/en not_active IP Right Cessation
-
2003
- 2003-05-14 CN CN03123699A patent/CN1450534A/en active Pending
- 2003-10-29 JP JP2003368306A patent/JP3806714B2/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3804240A1 (en) * | 1987-02-12 | 1988-08-25 | Hitachi Ltd | METHOD AND DEVICE FOR OPTICAL INFORMATION RECORDING |
US5412626A (en) * | 1992-03-23 | 1995-05-02 | Matsushita Electric Industrial Co., Ltd. | Method of recording optical information with selective correction in pulse waveform and a recording system therefor |
EP0713213A1 (en) * | 1994-11-18 | 1996-05-22 | International Business Machines Corporation | Pulse width modulation optical disk drive with pulsed laser preheating between marks |
Cited By (59)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0902424A1 (en) * | 1997-09-09 | 1999-03-17 | Hitachi, Ltd. | Information recording method and apparatus with suppressed mark edge jitters |
US6236635B1 (en) | 1997-09-09 | 2001-05-22 | Hitachi, Ltd. | Information recording method and apparatus with suppressed mark edge jitters |
US7852727B2 (en) | 1997-09-09 | 2010-12-14 | Hitachi, Ltd. | Information recording method and apparatus with suppressed mark edge jitters |
US7911910B2 (en) | 1997-09-09 | 2011-03-22 | Hitachi, Ltd. | Information recording method and apparatus with suppressed mark edge jitters |
US7907490B2 (en) | 1997-09-09 | 2011-03-15 | Hitachi, Ltd. | Information recording method and apparatus with suppressed mark edge jitters |
US7684301B2 (en) | 1997-09-09 | 2010-03-23 | Hitachi, Ltd. | Information recording method and apparatus with suppressed mark edge jitters |
US7042823B2 (en) | 1997-09-09 | 2006-05-09 | Hitachi, Ltd. | Information recording method and apparatus with suppressed mark edge jitters |
US6842415B2 (en) | 1997-09-09 | 2005-01-11 | Hitachi, Ltd. | Information recording method and apparatus with suppressed mark edge jitters |
US7907491B2 (en) | 1997-09-09 | 2011-03-15 | Hitachi, Ltd. | Information recording method and apparatus with suppressed mark edge jitters |
US6529467B2 (en) | 1997-09-09 | 2003-03-04 | Hitachi, Ltd. | Information recording method and apparatus with suppressed mark edge jitters |
US7012871B2 (en) | 1997-09-09 | 2006-03-14 | Hitachi, Ltd. | Information recording method and apparatus with suppressed mark edge jitters |
US6608806B2 (en) | 1997-09-09 | 2003-08-19 | Hitachi, Ltd. | Information recording method and apparatus with suppressed mark edge jitters |
US6343056B2 (en) | 1997-09-09 | 2002-01-29 | Hitachi, Ltd. | Information recording method and apparatus with suppressed mark edge jitters |
US7417933B2 (en) | 1997-09-09 | 2008-08-26 | Hitachi, Ltd. | Information recording method and apparatus with suppressed mark edge jitters |
EP1884938A2 (en) * | 1997-12-08 | 2008-02-06 | Koninklijke Philips Electronics N.V. | Method for writing optical record carriers |
EP1884938A3 (en) * | 1997-12-08 | 2008-07-02 | Koninklijke Philips Electronics N.V. | Method for writing optical record carriers |
US7209423B2 (en) | 1997-12-30 | 2007-04-24 | Samsung Electronics Co., Ltd. | Adaptive writing method for high-density optical recording apparatus and circuit thereof |
US7158461B1 (en) | 1997-12-30 | 2007-01-02 | Samsung Electronics Co., Ltd. | Adaptive writing method for high-density optical recording apparatus and circuit thereof |
US7391697B2 (en) | 1997-12-30 | 2008-06-24 | Samsung Electronics Co., Ltd. | Adaptive writing method for high-density optical recording apparatus and circuit thereof |
US8305857B2 (en) | 1997-12-30 | 2012-11-06 | Samsung Electronics Co., Ltd. | Adaptive writing method for high-density optical recording apparatus and circuit thereof |
EP0933759A2 (en) * | 1998-01-30 | 1999-08-04 | Sony Corporation | Data recording and optical disc drive |
US6222814B1 (en) | 1998-01-30 | 2001-04-24 | Sony Corporation | Recording/reproducing apparatus and method for phase-change optical disc |
EP0933759A3 (en) * | 1998-01-30 | 2001-01-10 | Sony Corporation | Data recording and optical disc drive |
US6631110B1 (en) | 1998-07-23 | 2003-10-07 | Samsung Electronics Co., Ltd | Adaptive writing method for high-density optical recording apparatus and circuit thereof |
SG108853A1 (en) * | 1998-07-23 | 2005-02-28 | Samsung Electronics Co Ltd | Adaptive writing circuit for recording apparatus |
US8315138B2 (en) | 1998-07-23 | 2012-11-20 | Samsung Electronics Co., Ltd. | Adaptive writing method for high-density optical recording apparatus and circuit thereof |
US8315145B2 (en) | 1998-07-23 | 2012-11-20 | Samsung Electronics Co., Ltd. | Adaptive writing method for high-density optical recording apparatus and circuit thereof |
US8315146B2 (en) | 1998-07-23 | 2012-11-20 | Samsung Electronics Co., Ltd. | Adaptive writing method for high-density optical recording apparatus and circuit thereof |
EP0977184A2 (en) * | 1998-07-23 | 2000-02-02 | Samsung Electronics Co., Ltd. | Adaptive writing method and circuit for a high-density optical recording apparatus |
US7986610B2 (en) | 1998-07-23 | 2011-07-26 | Samsung Electronics Co., Ltd. | Adaptive writing method for high-density optical recording apparatus and circuit thereof |
EP1282122A3 (en) * | 1998-07-23 | 2008-12-10 | Samsung Electronics Co., Ltd. | Adaptive writing method and circuit for a high-density optical recording apparatus |
US7916604B2 (en) | 1998-07-23 | 2011-03-29 | Samsung Electronics Co., Ltd. | Adaptive writing method for high-density optical recording apparatus and circuit thereof |
EP0977184A3 (en) * | 1998-07-23 | 2000-02-23 | Samsung Electronics Co., Ltd. | Adaptive writing method and circuit for a high-density optical recording apparatus |
EP1288922A3 (en) * | 1998-07-23 | 2008-12-10 | Samsung Electronics Co., Ltd. | Adaptive writing method and circuit for a high-density optical recording apparatus |
EP1282122A2 (en) * | 1998-07-23 | 2003-02-05 | Samsung Electronics Co., Ltd. | Adaptive writing method and circuit for a high-density optical recording apparatus |
US7391696B2 (en) | 1998-07-23 | 2008-06-24 | Samsung Electronics Co., Ltd. | Adaptive writing method for high-density optical recording apparatus and circuit thereof |
EP1282117A3 (en) * | 1998-07-23 | 2008-12-17 | Samsung Electronics Co., Ltd. | Adaptive writing method and circuit for a high-density optical recording apparatus |
US7391698B2 (en) | 1998-07-23 | 2008-06-24 | Samsung Electronics Co., Ltd. | Adaptive writing method for high-density optical recording apparatus and circuit thereof |
WO2000028535A1 (en) * | 1998-11-06 | 2000-05-18 | Matsushita Electric Industrial Co., Ltd. | Method and device for finding conditions on recording pulse of optical disk |
US6791926B1 (en) | 1998-11-06 | 2004-09-14 | Matsushita Electric Industrial Co., Ltd. | Method and device for finding conditions on recording pulse of optical disk |
US7248552B2 (en) | 1998-11-06 | 2007-07-24 | Matsushita Electric Industrial Co., Ltd. | Method and apparatus for determining recording pulse parameters for an optical disc |
US7236438B2 (en) | 1998-11-06 | 2007-06-26 | Matsushita Electric Industrial Co., Ltd. | Method and apparatus for determining recording pulse parameters for an optical disc |
US6975571B1 (en) | 1999-03-19 | 2005-12-13 | Matsushita Electric Industrial Co., Ltd. | Method for optically recording information and device for optically recording information by the same |
US7088656B2 (en) | 1999-03-19 | 2006-08-08 | Matsushita Electric Industrial Co., Ltd. | Method for optically recording information and device for optically recording information by the same |
EP1117094A3 (en) * | 2000-01-17 | 2006-11-15 | Mitsubishi Kagaku Media Co., Ltd. | Recording method for phase-change recording medium |
WO2001086643A3 (en) * | 2000-05-11 | 2002-03-21 | Koninkl Philips Electronics Nv | Methods and devices for recording marks on a recording surface of an optical record carrier |
WO2001086643A2 (en) * | 2000-05-11 | 2001-11-15 | Koninklijke Philips Electronics N.V. | Methods and devices for recording marks on a recording surface of an optical record carrier |
KR100779958B1 (en) * | 2000-05-11 | 2007-11-28 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | Methods and devices for recording marks on a recording surface of an optical record carrier |
EP1783749A1 (en) * | 2001-09-10 | 2007-05-09 | Pioneer Corporation | Information recording apparatus and information recording method |
US7349316B2 (en) | 2001-09-10 | 2008-03-25 | Pioneer Corporation | Information recording apparatus and information recording method |
WO2003023769A1 (en) * | 2001-09-10 | 2003-03-20 | Pioneer Corporation | Information recording apparatus and information recording method |
EP1783750A1 (en) * | 2001-09-10 | 2007-05-09 | Pioneer Corporation | Information recording apparatus and information recording method |
US7474601B2 (en) | 2001-09-10 | 2009-01-06 | Pioneer Corporation | Information recording apparatus and information recording method |
EP1729292A3 (en) * | 2001-09-10 | 2007-04-18 | Pioneer Corporation | Information recording apparatus and information recording method |
EP1729292A2 (en) * | 2001-09-10 | 2006-12-06 | Pioneer Corporation | Information recording apparatus and information recording method |
US7139230B2 (en) | 2001-09-10 | 2006-11-21 | Pioneer Corporation | Information recording apparatus and information recording method |
US7190659B2 (en) | 2002-05-09 | 2007-03-13 | Fuji Photo Film Co., Ltd. | Optical information recording method and optical information recording medium |
EP1361569A3 (en) * | 2002-05-09 | 2006-08-30 | Fuji Photo Film Co., Ltd. | Optical information recording method and optical information recording medium |
US8045437B2 (en) | 2002-06-18 | 2011-10-25 | Koninklijke Philips Electronics N.V. | Method and device for recording marks representing data in an information layer of an optical record carrier |
Also Published As
Publication number | Publication date |
---|---|
KR100498623B1 (en) | 2005-09-30 |
CN1320528C (en) | 2007-06-06 |
CN1111846C (en) | 2003-06-18 |
JP3608926B2 (en) | 2005-01-12 |
US6529466B2 (en) | 2003-03-04 |
CN1516120A (en) | 2004-07-28 |
US6404716B1 (en) | 2002-06-11 |
US6104685A (en) | 2000-08-15 |
EP0851413A3 (en) | 1999-08-18 |
CN100535997C (en) | 2009-09-02 |
DE69731364T2 (en) | 2006-02-02 |
JPH10241164A (en) | 1998-09-11 |
US6188658B1 (en) | 2001-02-13 |
KR19980064227A (en) | 1998-10-07 |
US20020041553A1 (en) | 2002-04-11 |
US20020041558A1 (en) | 2002-04-11 |
JP2004087125A (en) | 2004-03-18 |
EP0851413B1 (en) | 2004-10-27 |
CN1450534A (en) | 2003-10-22 |
DE69731364D1 (en) | 2004-12-02 |
CN1681010A (en) | 2005-10-12 |
CN1186297A (en) | 1998-07-01 |
KR100522314B1 (en) | 2005-10-18 |
US6512726B2 (en) | 2003-01-28 |
JP3806714B2 (en) | 2006-08-09 |
TW379323B (en) | 2000-01-11 |
US6430132B1 (en) | 2002-08-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6104685A (en) | Information recording apparatus | |
KR100606255B1 (en) | Information recording apparatus | |
US6671239B2 (en) | Information recording/reproducing apparatus and method and information recording medium | |
KR20000017004A (en) | Information recording method, information recording media and information recording device | |
US6058077A (en) | Signal reproducing method and apparatus for reproducing information by moving magnetic wall | |
JP2001331958A (en) | Optical control circuit | |
US7773483B2 (en) | Information recording apparatus | |
KR100545320B1 (en) | Data recording apparatus | |
JP3357095B2 (en) | Magneto-optical disk edge recording / reproducing device | |
JP4538362B2 (en) | Information recording device | |
JP3800534B2 (en) | Information recording device | |
JPH1125535A (en) | Method for adjusting phase between laser and magnetic field when magneto-optical disk is recorded and magneto-optical disk device | |
JPH11134692A (en) | Optical disk recorder | |
JPH0944848A (en) | Optical information recording control method | |
JPH1092036A (en) | Magnetooptical recording and reproducing method and device therefor | |
JPH1055580A (en) | Magneto-optical recording method and device | |
JPH04278242A (en) | Magnetooptical recording and reproducing apparatus | |
JPH05197958A (en) | Method for recording optical information | |
JPH08221786A (en) | Recording waveform control method | |
JP2000021042A (en) | Magneto-optical recording and reproducing method and device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): DE FR GB |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
RIC1 | Information provided on ipc code assigned before grant |
Free format text: 6G 11B 7/00 A, 6G 11B 11/10 B |
|
17P | Request for examination filed |
Effective date: 19990903 |
|
AKX | Designation fees paid |
Free format text: DE FR GB |
|
17Q | First examination report despatched |
Effective date: 20030224 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REF | Corresponds to: |
Ref document number: 69731364 Country of ref document: DE Date of ref document: 20041202 Kind code of ref document: P |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
ET | Fr: translation filed | ||
26N | No opposition filed |
Effective date: 20050728 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R082 Ref document number: 69731364 Country of ref document: DE Representative=s name: STREHL, SCHUEBEL-HOPF & PARTNER, DE |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R082 Ref document number: 69731364 Country of ref document: DE Representative=s name: STREHL SCHUEBEL-HOPF & PARTNER MBB PATENTANWAE, DE Effective date: 20130624 Ref country code: DE Ref legal event code: R082 Ref document number: 69731364 Country of ref document: DE Representative=s name: PATENTANWAELTE STREHL, SCHUEBEL-HOPF & PARTNER, DE Effective date: 20130624 Ref country code: DE Ref legal event code: R082 Ref document number: 69731364 Country of ref document: DE Representative=s name: STREHL, SCHUEBEL-HOPF & PARTNER, DE Effective date: 20130624 Ref country code: DE Ref legal event code: R081 Ref document number: 69731364 Country of ref document: DE Owner name: HITACHI MAXELL, LTD., IBARAKI, JP Free format text: FORMER OWNERS: HITACHI, LTD., TOKYO, JP; HITACHI MAXELL, LTD., IBARAKI, OSAKA, JP Effective date: 20130624 Ref country code: DE Ref legal event code: R081 Ref document number: 69731364 Country of ref document: DE Owner name: HITACHI CONSUMER ELECTRONICS CO., LTD., JP Free format text: FORMER OWNERS: HITACHI, LTD., TOKYO, JP; HITACHI MAXELL, LTD., IBARAKI, OSAKA, JP Effective date: 20130624 Ref country code: DE Ref legal event code: R081 Ref document number: 69731364 Country of ref document: DE Owner name: HITACHI MAXELL, LTD., IBARAKI, JP Free format text: FORMER OWNER: HITACHI, LTD., HITACHI MAXELL, LTD., , JP Effective date: 20130624 Ref country code: DE Ref legal event code: R081 Ref document number: 69731364 Country of ref document: DE Owner name: HITACHI MAXELL, LTD., JP Free format text: FORMER OWNER: HITACHI, LTD., HITACHI MAXELL, LTD., , JP Effective date: 20130624 Ref country code: DE Ref legal event code: R081 Ref document number: 69731364 Country of ref document: DE Owner name: HITACHI CONSUMER ELECTRONICS CO., LTD., JP Free format text: FORMER OWNER: HITACHI, LTD., HITACHI MAXELL, LTD., , JP Effective date: 20130624 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: TQ Owner name: HITACHI MAXELL,LTD, JP Effective date: 20130906 Ref country code: FR Ref legal event code: TQ Owner name: HITACHI CONSUMER ELECTRONICS CO. LTD., JP Effective date: 20130906 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: 732E Free format text: REGISTERED BETWEEN 20140213 AND 20140219 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 19 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20161213 Year of fee payment: 20 Ref country code: GB Payment date: 20161214 Year of fee payment: 20 Ref country code: FR Payment date: 20161111 Year of fee payment: 20 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R071 Ref document number: 69731364 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: PE20 Expiry date: 20171216 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20171216 |